Blind-slat-tenoning machine



3 Sheets-Sheet 1.

(No Model.)

. W.. H. DOANE. BLIND SLAI' TENONING MAGHINE.

Eugen/@221 Mu WRJSOM n. PETERS, PlwwLnm m r Washingmn.

3 Sheets-Sheet 2. W. H. DOANE.

Patented Oct. 16, 1888.

(No Model.)

BLIND SLAT TENONING MACHINE.

(No Model.) 3 SheetsSheet 3 W. H. DOANE.

BLIND SLAT TBNONING MAGEINE. I No. 391,231. PatentedOct. 16, 1888.

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UNITED STATES PATENT Orrrcn.

\VILLIAM H. DOANE, OF CINCINNATI, OHIO.

BLlND-SLAT-TENONING MACHINE.

SPECIFICATION forming part of Letters Patent No. 391,231, dated October 16, 1888.

A pplieation filed September 27, 1887.

To all whom it may concern.-

Be it known that 1, WILLIAM H. DOANE, a citizen ofthe United States, residing at Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Blind Slat-Tenoning Ma chines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to machines for tenoning blind-slats; and it consists of certain improvements in the construction and arrangement of parts of the same, which render the machine substantially automatic in its operation.

One of the principal objects of my invention is to provide a means of automatically presenting a slat-strip to a cutting and tenoning device, holding it there long enough for the strip to be severed and a tenon formed on each of the severed ends, then returning the slatstrip to its startingpoint and holding the stripcarrying devices from movement long enough to permit the advance of the strip for the formation of another slat, when the strip will be again moved forward without any action on the part of the operator.

In order that my device may be clearly understood, I have illustrated it in the several views of the annexed drawings, and will describe it in the following specification.

The same referenceletters have been used to identify similar parts throughout the several drawings.

Figure 1 is a front elevation. Fig. 2 is an end view. Fig. 3 isaplan View. Fig. 5 is an enlarged view of parts of the machine, chuck, chuck-frame, and pitman. Fig. 4 is aseetional view of chuclgtaken on line mm of Fig. 5. Fig. 6 is a detail View, partlyin section, of the pawl and chuck-frame, a portion of the latter being broken away. Fig. 7 is a detail sectional view of the adjustable stop-rod stand.

The main column A of my improved machine is provided with a bracket, B, firmly secured to it in any desired manner, and also has a lateral extension, B, near its upper end. Mounted in the bracket B in suitable bearings is the shaft 0, which carries the pulley O, the driving-pinion C and the chuck-frame C.

Serial No. 250,793. No model.)

The bearing of the shaft nearest the pulley O is provided with a sleeve-extension, C", Fig. 6, on which is mounted the pawl o. This pawl is secured from longitudinal movement on the sleeve by the set-screw c. The lower or rear extremity of the pawl is provided with a slight projection, 0 which, when the chuck-frame springs up, rests upon the head of the setscrew 0, thus relieving the set-screw c of any strain.

The cutterhead consists substantially of two cutters, S and S of the construction ordinarily employed in this class of machine, and a saw, S, centrally located between them.

D D are chucks, within which the slats are inserted. These chucks rotate in complete journal-boxes in the frame O", and are pro-- vided with jaws d d, which are adjustable by means of the screw d", which is oppositely threaded from a point midway its extremities. This screw has a bearing in the projecting lugs d of the chucks and operatively engages the oppositelyscrew-threaded projections, (1 of the jaws. The jaw (1 has an upwardly-extending flange, (1, provided with a pin, (1 which works in the slot (1 This pin is capable of receiving a nutat its outer extremity, by which thejaw d is secured at a desired point.

Thejaw (6 consists of two parts, d and zl". d is substantially of the same shape and con struction as the jaw (l, and has a downward projection corresponding to c", secured in the same manner. Adjustably connected to the part (1 isthc part 11-, forming the jaw proper. In the rear of the jaw d" and between it and its frame is a. spring, d", for the purpose of allowing for any slight variation in the width 01' slats. The spring (1 is shown in this instance as composed ot'a piece of rubber; butany other form of spring may be employed. Both jaws may be constructed in like manner, if desired.

The entire frame 0 swings on the shaft 0, in order that the work may be brought to and fro m the cutter-head. The chucks are driven simultaneously by means of wheels E operated by the pinions 0'.

Between the two forwardly-extending arms of the frame 0 is pivoted the sleeve E, in which the pitman E is inserted and secured by means of the setscrew e.

e is a set-screw, with jam-nut engaging top of pitman to compensate for any wear of the saws or other cause necessitating a change in the length of the pitman. The pitman is steadied by means of the projection e from the main frame, through which it passes. Between this projection and the sleeve E is a coiled spring, E passing round the pitman. This spring may be interposed between the standard and frame, or, applied to an extension of the pitman or the chuck-frame, may be extended on the opposite side of its pivot and a contractile spring employed connecting such extension with standard.

- F is a cap secured to the bracket or projection F from the main column to hold the pitman in its seat in the said bracket or projection.

, The bracket F carries the worm-wheel F, mounted on a shaft, f, and near the end of this shaft is rigidly secured the cam f. The pitman is provided near its lower extremity with a frictionroller, f engaging cam f. This cam is provided with a slow or gradual inclined surface, 9, which ends in an abrupt shoulder, g, and the beginning of the incline is a concentric portion, This construction of the cam gives a slow progressive movement to the chuck-frame when carrying the slat toward the cutter-head, and when this has done its work permits thesprin g to retract the chuckframe by a quick movement. The concentric portion 9 gives a sufficient interval of rest between the return and the succeeding advance movement of the chuck-frame to enable the operator to advance new material for the action of the cutter head. The slow progressive movement of the chuck-frame toward the cutter-head is an important feature, as it renders the work of the machine smooth and even and avoids the disagreeable jumping which is common to the machines as heretofore constructed.

The mechanism operating the chuck-frame gives ita continuous intermittent feeding motion, consisting of a slow advance toward the cutting devices and a quick return movement away therefrom,with a period of rest after the return movement to permit the slatstrip to be advanced in the chucks. This feeding movement is regular and continuous as long as the chucks are in operation without requiring any labor or attention on the part of the operator. As it has this regular and continuous movement and operates at the proper times at different determined rates of speed without manual direction or control, it is termed an automatic feed.

The worm -wheel 15 isoperatively connected with the worm F which is journaled in bracket-bearings secured to the inner side of the main column and is driven by the pulley 13 and belt gearing. The outer end of the shaft of theworm F is provided with a pulley, F which is connected by a belt with the pulley O.

The power-shaft H is provided with a working and idler pulley, H and H also with the spindle driving pulley-wheel H and the col lar H to hold the small cone H forming a part of the main pulley H.

. I is a yoke connected at one extremity with the lever I and at the other with the clutch 1 The lever 1 is pivoted to the projection I from the main frame, and is provided at its upper extremity with a handle, 1*. This lever is for the purpose of starting and stopping the motion of the chuck-frame by means of the yoke I, operating the clutch I. The cone H runs idle on shaft when the parts are in the position shown in the drawings, andis for the purpose of changing the speed of the machine by connecting it with the pulley B on worm shaft.

Adjustably secured to the top of the main column is the stop-rod stand K, consisting of two parts, the upright K provided with the sleeve 70 and the horizontal portion K, which passes through the sleeve k, and held in any desired position by the set-screw 7c. The stop proper,7c,is attached to the stop-rod stand by means of the shoe k in a well-known manner. The stop being mounted on an adjustable standard in the manner indicated,it may be placed on either end of K, and so be used for long or short slats.

The pawl c is for the purpose of stopping the movement of the chucks by engaging the projection 0 on the chuck-frame until another slat-strip can be moved forward into position to be operated upon, the driving-belt meanwhile running idle on the pulley G. Thelowering of the chuck-frame releases the projection 0 from-operative engagement with the pawl.

L is the cover for the spindle and pulley.

The shavings and dust are removed by the web M,located upon the inside of the column.

The operation of the machine is as follows: The slat-strip is inserted between the jaws d d ICC until one end comes in contact with the stop 7o which has been adjusted to provide for the desired length of slat. The chuckframe-opcrating mechanism is then started by means of the lever I. The chucks at firstare locked from motion by the pawl c engaging the projection 0 but the worm F engaging thewormwheel F", forces the eccentric portion of the cam f against the friction-roller f of the pitman, which is attached to the swinging ends of the chuck-frame, thereby forcing the chuckframe, and consequently the chucks and slatstop, slowly toward the cutter-head,and at the same time disengaging the pawlc from the projection 0 The, chucksat once begin to rotate, and the cutter-head is so located and arranged that at a single rotation of the chucks the tenons on the adjacent ends of two slats are formed and the central saw severs the finished slatfrom the strip. The eccentric portion of the cam acting on the friction-roll at tached to the pitman forces the pitman-slowly downward, carrying with it the swinging chuck-frame and contracting the spring E As soon as the friction-roller reaches the end of the eccentric portion of the cam, the pitman is released and the spring carries it and the chuck-frame into their original position, the pawl ere-engaging the projection 0 The frietionrollf being now opposite the eccentric portion of the cam, the chuck-frame and chuck remain at rest, affording an opportunity for the operator to advance the slat-strip for a repetition of the operation. The advancement of the slat-strip generally expels the finished slat. Should, however, the same be held by its contact with the stop k it can be readily removed by the operator.

What I claim, and desire to secure by Letters Patent, is-

1. A blind-slat-tenoning machine provided with a tenoning and slat-severing cutter-head mounted in suitable bearings, and a movable slatchuck having a slow automatic feed forward and a quick return movement from the cutter-head, substantially as described.

2. A blindslat-tenoning machine havinga stationary cutter-head and stationary slat-severing device, whose axes are located in sub stantially the same plane, a swinging chuckframe, and an automatic feeding device connected with the chuck-frame and moving it to and from the tenoning and severing devices, whereby a single reciprocation of the swinging chuck-frame forms a tenon and scvers the slat, substantially as described.

3. Ina blind-slat-tenoning machine,the combination, with a snpporting-standard having a lateral extension near its upper end, of a cutter head and shaft, the said shaft being mounted in a bearing on said lateral extension and having a pulley between said bearing and the standard, and the slatstop mounted on said extension, substantially as described.

4. In abliud slat-tenoning machine,the combination, with hollow supporting-column, of a swinging chuekframe mounted on said column and chuck-frameoperating mechanism located within said column and supported thereby, substantially as described.

5. In a blind-slat-tenoning machine,thecombination, with a swinging chuck-frame, of

chuck-frame-operating mechanism and an adjustable connection between said mechanism and said chuck-frame, whereby the movement of the swinging chuck-frame can be Varied or adjusted, substantially as described.

6. In a blind-slattenoning machine, the combination, with an adjustable standard, of an adjustable slat-stop adj ustably mounted in said standard, substantially as described.

7. In a blind-slattenoning machine,thc combination, with an adjustable standard, of a slatstop adj ustably and reversibly mounted in said standard, substantially as described.

8. In ablind-slattenoning machine, the combination, with an adjustable standard, of a rod adj ustably mounted in said standard and a slat-stop adjustably mounted on said rod, substantially as described.

,9. Inablindslattenoningmachine, the combination, with a main supporting standard or frame and a swinging chuck-fran1e, of a pitman connected to said chuck-frame, a cam acting on said pitman for moving it in one dition, substantially as described.

10. In a blind-slat-tenoning machine, a slatchuck having an adjustable jaw, said jaw consisting of two parts, one movable upon the other, and a spring interposed between the parts, substantially as described.

11. A slat-chuck having movable jaws providcd with flanges andeach having a projection extending from one of its sides, a rightand-left screw jonrnaled on said chuck and passing through and operatively engaging the said projection, andchuckbolts opcratively engaging the flanges for rigidly securing the jaws in their adjusted position, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

WILLIAM H. DOANE.

Witnesses:

L. K. BYRNS, A. M. SPENCER. 

